The constraint I'd add for solo SaaS is "can I find one beta user this week." Time, scope, tech all stayed reasonable on my one pager but a project can pass tho

The constraint I'd add for solo SaaS is "can I find one beta user this week." Time, scope, tech all stayed reasonable on my one pager but a project can pass those filters and still die because no one walks in the door. Adding a distribution constraint upfront forced me to validate the audience before I went deep on features.